Wochenenderaetsel

[Rene]

Anyone care for a guess??



Best wishes, René

[Kurt Wirz]

Hallo René
Ich vermute eine "Faden"Alge.

Kurt

[Raymond]

Hallo René,

a diatom spore, I think....

[Rene]

well, the first Kudo for Raymond. It shouldn't be hard now to get to the genus level, and I'll show the rest of the image.

Best wishes, René

[Jan Kros]

Hallo René
This ia a auxospore form Chaetoceros
Greetings
Jan

[ruhop]

Hallo, Rene.

Attheya zachariasi. Ich habe so etwas auch grade im Plankton des Hattsteinweihers gesehen.

Schönen Gruß ais dem Hintertaunus

Holger

[Rene]

Well, here's a larger part of the image:



Jan is right, it is Chaetoceros, a marine species of centric diatoms. Spore formation is pretty common in this genus, and very useful for correct identification to species level. In this case, the spore is very characteristic for Chaetoceros lorenzianus. Without the spore, it is often hard to discriminate the vegetative state of this species with C. decipiens, also a pretty common sp. in Dutch and Deutsch coastal waters.

Kurt and Holger, thanks for your input. The outline  in the first image could indeed have been mistaken for Attheya.  Unfortunately, I have never had the luck to observe Attheya resting spores.

Best wishes, René